SIEMENS
FLENDER Standard Couplings
Torsionally Rigid All-Steel Couplings — ARPEX ARP-6 Series
General information
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Siemens MD 10.1 · 2015
6
■
Design
NAN: The design of an ARPEX NAN coupling of the ARP-6 series
is shown in the following illustration. The plate packs are bolted
alternately between the flanges of the coupling hubs and the in-
termediate spacer. Up to size 298-6 close-fitting bolts and from
size 325-6 conical screw connections are used for fastening.
The intermediate spacer is available from stock in various fixed
lengths. Hubs are designed with threaded pull-off holes.
MCECM: The design of an ARPEX MCECM coupling of the
ARP-6 series is shown in the following illustration. Bolted be-
tween two hubs is the CEC transmission unit, the preassembled
plate packs of which are bolted alternately between flanges and
intermediate spacer. Up to size 275-6 close-fitting bolts and from
size 310-6 conical screw connections are used for fastening.
The intermediate spacer is available from stock in various fixed
lengths. Jumbo hubs for large bore diameters can be optionally
used.
Design of the ARPEX coupling, ARP-6 series
Variants of the ARPEX coupling, ARP-6 series
Further application-specific coupling types are available in
selection module
X.CAT NG
at
www./couplings
.
Dimension sheets and further information are available on re-
quest.
■
Technical data
Power ratings, type NAN
Hub
Hub
Close-fitting bolt
Plate pack
Intermediate flange
G_MD10_EN_00159a
Close-fitting bolt
Collar nut
Collar nut
Plate pack
Type MCECM
Type NAN
Guard ring
Guard ring
Intermediate spacer
Intermediate
spacer
Types
NAN
Variant with intermediate spacer, various fixed lengths
available from stock
MCECM
Variant with preassembled intermediate unit and spacer
machined on all sides, various fixed lengths available from
stock
Size
Rated
torque
Maxi-
mum
torque
Over-
load
torque
Fatigue
torque
Maxi-
mum
speed
Maximum permitted shaft misalignment
Torsional stiffness
±
Δ
K
a
±
Δ
K
w
±
Δ
K
r
C
T
T
KN
T
Kmax
T
KOL
T
KW
n
Kmax
S =
100
mm
S =
140
mm
S =
180
mm
S =
200
mm
S =
250
mm
S =
100
mm
S =
140
mm
S =
180
mm
S =
200
mm
S =
250
mm
Nm
Nm
Nm
Nm
rpm
mm
mm
mm
mm
mm
mm
MNm/
rad
MNm/
rad
MNm/
rad
MNm/
rad
MNm/
rad
88-6
190
270
450
70
21700
1.10
0.7°
1.15
1.64
–
–
–
0.04
0.04
–
–
–
115-6
270
410
680
110
16600
1.81
1.15
1.64
2.13
–
–
0.09
0.09
0.08
–
–
135-6
580
870
1450
230
12700
2.02
1.14
1.62
2.11
–
–
0.21
0.19
0.17
–
–
150-6
660
100
1650
270
11400
2.41
1.14
1.62
2.11
2.36
2.97
0.27
0.25
0.24
0.23
0.21
176-6
1220
1900
3100
490
9750
2.75
1.11
1.6
2.09
2.33
2.94
0.44
0.40
0.38
0.36
0.34
185-6
1875
2900
4700
750
9300
2.85
1.09
1.58
2.06
2.31
2.92
0.56
0.52
0.49
0.47
0.44
212-6
2850
4230
7200
1200
8100
3.06
1.10
1.59
2.08
2.32
2.93
0.81
0.75
0.70
0.67
0.62
225-6
4200
6300
10500
1700
7650
3.14
–
1.59
2.08
2.32
2.93
–
0.85
0.81
0.79
0.74
256-6
5750
8700
15000
2300
6700
3.69
–
1.56
2.05
2.3
2.91
–
1.37
1.31
1.29
1.22
272-6
8050
12000
20000
3200
6300
3.85
–
1.51
2
2.25
2.86
–
1.44
1.39
1.36
1.3
298-6
10000
15000
25000
4000
5150
4.19
–
1.47
1.95
2.2
2.81
–
1.47
1.43
1.41
1.37
325-6
12000
18000
30000
4800
4700
4.45
–
–
1.93
2.17
2.79
–
–
2.48
2.44
2.34
© Siemens AG 2015